Synthesis, characterization and radiolabeling of carborane-functionalized tetrazines for use in inverse electron demand Diels–Alder ligation reactions
作者:Afaf R. Genady、Joanne Tan、Mohamed E. El-Zaria、Aimen Zlitni、Nancy Janzen、John F. Valliant
DOI:10.1016/j.jorganchem.2015.05.033
日期:2015.8
Carborane-tetrazine derivatives were developed that can be used to enable boron clusters to bind specific targets in vivo using pretargeting strategies and bioorthogonal inverse electron demand Diels–Alder chemistry. Specifically, 1,12-dicarba-closo-dodecaborate-1-(4-(1,2,4,5-tetrazin-3-yl)phenyl)methanamide and 1,2-dicarba-closo-dodecaborate-1-(4-(1,2,4,5-tetrazin-3-yl)phenyl)methanamide were synthesized
开发了碳硼烷-四嗪衍生物,可使用预靶向策略和生物正交逆电子需求Diels-Alder化学方法,使硼簇在体内结合特定靶标。具体而言,1,12- dicarba-闭合碳-dodecaborate -1-(4-(1,2,4,5-四嗪-3-基)苯基)methanamide和1,2- dicarba-闭合碳-dodecaborate -1-(4-分别以49%和78%的产率合成了-((1,2,4,5-四嗪-3-基)苯基)甲酰胺,并测定了两种化合物的X射线结构。在温和的条件下,将邻-甲硼烷衍生物转化为相应的Nido-簇,并用125 I和123成功地对产物进行了放射性标记。I.碳硼烷-四嗪通过[4 + 2]逆电子需量Diels-Alder型反应与(E)-环辛-4-烯醇(TCO)迅速定量反应,其中乙腈中的二阶速率常数碘化簇的峰数为199±26 M -1 s -1。标记的四嗪在溶液中可长期稳定,并且显示出它们